Apparatus for producing mixtures of gases or of gas and air for illuminating purposes.



No. 855,953. PATBNTED JUNE 4, 1907.

. H. L. KARGER.- AAPIARATUS FOR PRODUGING MIXIURES OF GASES 0R 0]:1 GAS AND AIR,k

FOR ILLUMINATINGPURPOSES.

APPLICATION FILED JULYS. 1903.

2 Bumm-SHEET 1.

i rlllllllllllllll ll 1H: nemers sn-Rs cu.. wnumaru/v, o4 c PATBNTED JUNE A, 1907. A H; L. KARGBR. APPARATUS FOR PRODUSING MIXTURES 0F GASES 0R 0F GAS AND AIR POR ILLUMINATING PURPOSES.

APPLIOATION FILED JULY 0,1903.

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UNITED sTATEs PATENT oIrIrIoE.

HEINRICH LOUIS KARGER, OF BERLIN, GERMANY, ASSIGNOR TO SELAS GESELLSCHAFT MIT BESOHRNKTER IIAFTUN G, OF BERLIN, GERMANY.

APPARATUS FOR PRODUCING MIXTURES 0F GASES 0R 0F GAS AND AIR- FOR ILLU'MINATING PURPOSES.`

Patented June 4, 1907.

Application iiled July 6,1903. Serial No. 164,327.

To all whom it may concern:

Be it known that I, HEINRICH LoUIs KAR- GER, a subject of the Emperor of Germany, residing at 26 Frankfurter Allee, Berlin, in the Empire of Germany, engineer, have invented certain new and useful Improvements in Apparatus for Producing Mixtures of Gases or of Gas and Air for Illuminating Purposes, of which the following is a specification.

This invention has reference to apparatus for roducing a mixture of gases or of gas and air for illuminating purposes, of the kind described in the specification of British Letters Patent No. 16055 of 1901. In the aforesaid specification is described a method for producing a mixture of gas and air for illuminating purposes by means of suction and forcing appliances, in accordance with which method the gas and air are sucked in separately in a predetermined ratio through admission devices dependent u on the operation of the said suction and lorcing apparatus, whereupon they are forced into the common pressure or service main. This arrangement however presents the defect that no provision is made for an intimate mixture of the air and gas either in the suction and forcing chamber or during admission to the same. This intimate mixture is impeded whether several inlet passages are provided situated at a distance one from the other or if the suction of gas and air is effected insuccession.

In accordance with the present invention however, the two admission devices for gas and air respectively which are dependent upon the operation of the suction and forcing appliances, are arranged behind the admission aperture common to them both, in

such a manner that during the admission to' the suction chamber the gas and air mutually penetrate each other. By this means the gas sucked in exerts to a certain extent an injector-like action upon the air that is to say, the air is sucked in not directly owing to the direct action of the suction appliance but by the gas which is sucked in. Preferably the gas is sucked through the air in a number of jets. A further advantage presented by this arrangement is that a common actuating rod may be employed. Still another advantage consists inthe fact that a specially favorable arrangement of the circulation conduit usual in suction and forcing apparatus of this kind is rendered possible. Owing to the close juxtaposition of the two admission apertures, which may advantageously be arranged directly one behind the other, the operation of the air mixing device is rendered more efIicient by reason of the fact that a circulation conduit of the known kind for maintaining a fixed pressure with a continuously acting suction and forcing apparatus, need only be provided with a single obturating member for both admission devices, so that if the predetermined pressure is exceeded in the service pipe both admission devices will ,be rendered inoperative by this one special obturating member, without its being in anyway impeded in its further operation dependent upon `the uninterrupted working of the suction and forcing apparatus. In order to insure. eflicient working, it is essential that when the suction process is interrupted both the admission a ertures shall certainly be obturated. Adc itional'advantages in the construction of the device as a whole and in its certainty of action` which are hereinafter referred to, are secured by the novel arrangement of the valves in accordance with this invention.

In the accompanying drawing: Figure 1 is a constructional form of the apparatus including the circulation conduit. Fig. 2 illustrates a modified form of apparatus, and Figs. 3 and 4 represent upon a larger scale in crosssection the arrangement of the valves suited to the respective constructional forms illustrated in Figs. 2 and 1.

In the drawing the principal parts are designated by the same reference numerals as inY the aforesaid prior specification, while for the other parts letters of reference are employed.

In the arrangement illustrated in Fig. 1, the supply chamber 14 of the suction and forcing apparatus formed by the cylinder 13 and piston 12, is in communication with the mixing chamber 4, which contains the gas admission valve 5 and the air admission valve 17. These two valves are mounted upon the same rod 6, which is connected with a crank or eccentric device A7, so that the two valves are operated from the shaft 9, which imparts IOO mounted either loosely or rigidly upon the common valve rod. In the first case, a

s rin a ma advantageouslyT be arran ed.

'between the gas obturating member 5 and the air obturating member 17, which spring tends to apply the valve body 17 upon its seat.

The gas conduit 3, in which a non-return valve b is arranged, opens into the chamber d situated between the valve bodies 5 and 1.7.

Fromthe pressure or service pipe 24, which-is in communication with the suction and forcing apparatus by the intermediary of the common pressure valve 22, which is arranged in the valve box 21, in such a manner as tobe constantly acted u onr by a spring 23, there branches off a pipe l which opens into the gas supply pipe between the admission devices 5, 17 and the non-return valve b; In this pipe, ordinarily termed the circulation conduit, an excess pressure valve h is arranged; this valve may be provided with a regulating device for adjusting it tovarious pressures. In the example represented the valve body h of this valve is connected with a membrane t', which normally appliesthe said valve body h upon its seat but opens the valve when it bulges upwardly. y

During the period of suction into the suction and forcing apparatus, the valves 5 and 17 are open. Gas is then sucked from the gas main 3, or its continuation the pipe c, through the open valve 5 and the non-return valve Z which is thereby caused to open also, and at the same time air is sucked in from without through the valve 17 and the apertures g. Obviously the air entering immedi- -ately behind thegas, penetrates this gas in the manner of an injector and enters the supply chamber 14 intimately mixed with the gas, through the admission assage f. An admixture of gas and air ierefore takes place outside the supply chamber 14. From the supply chamber 14 the mixture of gas and air passes through the common pressure valve 22 into the service pipe 24.

When an excess of pressure occurs in the service pipe 24, which may be the-case when less of the gas and air mixture is consumed than is produced, this excess of pressure will cause the membrane i to swell or bulge u ward, thereby lifting the valve h so that t e mixture of gas and air which passes from the conduit 24 into the conduit lc is able to pass through the open valve h into the conduits Z loosely upon the valve rod. During the suc-- tion period in the suction and forcing apparatus, only the gas valve 5 will then be lifted, because the air valve 17 is maintained closed by the excess pressure. Through this open gas valve 5 the mixture ofgas and air is sucked out of the circulation conduit 7c Z; that is to say, out of the service pipe 24. An important feature of this arrangement is that when an excess of pressure is produced in the service pipe, both the gas and air .inlets are obturated. Owing to this, the mixture sucked back out of the pipe 24 experiences no alteration in its composition, and is forced back into the service pipe in exactly the same condition as it was withdrawn therefrom.

The constructional form of apparatus illustrated in Fig. 2, differs from thatl represented in Fig. 1 owing to the fact that no special air obturating valve is provided. The obturating member for the air admission is combined with the obturating member for the gas supply (Fig. 3). In this form of the apparatus a special obturating member p .is provided, which is guided in the casing 4 by a rod n and is submitted to the-influence of a spring m which constantly tends to maintain the body p in-its obturating position. During the suction stroke of the piston 12` first the obturating member p and then the valve 5 is lifted so that gas and air reach the space e of the valve box 4 situated above the obturating member p and then pass into the suction and forcing chamber 14. In-order to render the admixture of gas and air still more intimate, there are formed in the seat face g of the `valve 5, radially arranged passages o opening into an annular passage 7', which communicates with the gas supply pipe 3. The gas is sucked through these passages so that it meets the air in jets. Owing to the special manner in which the gas encounters the air an intimate mixture of both will take place. In addition to this the injector like action exerted by the gas upon the air is increased.

The circulation conduit, through which the mixture of gas and air is sucked back into the suction and forcing'chamber 14 when an excess of pressure occurs in-the service pipe 24, does not in this case lead into the gas supply pipe 3, but into the space above the special obturating member p. Owing to the excess of pressure of the mixture of gas and. air, the obturating body is pressed upon its seat so that in the suction stroke of the pis-A ton 12 the communication between the chamber 14 and the gas and air supplies is interrupted. The admission valves for the gas and air are however still'displaced owing to IOC IOS

IIO

ing from the other inlet so as to thoroughly their positive connection with the crank 7, l commingle the air and gas, and mechanism by means of the rod 6, terminating at its l connected with a pressure main and oonlower end in a hook 6a. l trollable by pressure therefrom for governing What I claim and desire to secure by Leti the flow of aeriform bodies through said inters Patent of the United States is lets.

In an apparatus of the oh araoter described, In testimony whereor1 I have hereunto set the combination of pumping mechanism promy hand in presence of two subscribing witzo viipledbwitlh a mixing olliamber, sai mixing nesses this 19th day of June 1903.

o am er raving two in ets arrange successively, one Jfor admitting air and the other for i HEINRICH LOUIS KARGER' admitting gas, one inlet being disposed at an i Vitnesses:

` WOLDEMAR IIA-UBT,

angle to the path of the aeriform body flow- IIENRY HASPER. 

